Question about 2005 GMC Envoy

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Fan clutch loud

I just replaced fan clutch and water pump, at start up. And first minute of driving sounds like a jet plane then backs off and runs fine?

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  • GMC Master
  • 1,727 Answers

Usually that sound is associated with a defective clutch fan... did you get the right one for your application... thermal or non thermal

did you purchase an after market cheap one... I'd replace it with another one and try again

Posted on Dec 28, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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justuscc
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SOURCE: Loud Cooling Fan

that fan is very loud on that truck. if its not makin noise its not cooling. common on gm trucks

Posted on Sep 29, 2008

  • 462 Answers

SOURCE: i have a 1990 gmc suburban 1500 with a 350 i

IS THE BELT ON IN THE RIGHT DIRECTION?

Posted on Jul 13, 2009

  • 1114 Answers

SOURCE: Pulling a fan clutch assembly from a GMC 4.3 water pump?

First remove the fan from the clutch. There should be four to six bolts holding the fan to the clutch. The clutch is held on to the pump with four bolts. remove the four bolts to remove the clutch. I've included a pic of the pump to indicate the four mounting holes. Not sure if the link will work.

http://www.1aauto.com/scripts/view_full_image.php?image_url=http://images.1aauto.com/EWP/1AEWP00011.jpg&description_id=1090439

Posted on Aug 10, 2009

emissionwiz
  • 76846 Answers

SOURCE: 2003 envoy sounds like a jet i just replaced fan

IT MAY BE THAT THE CLUTCH IS LOCKED UP BY DEFAULT, SO THE ELECTRONICS TO THE FAN CLUTCH ARE MOST LIKELY THE PROBLEM.

Posted on Aug 10, 2009

Mustgo
  • 2359 Answers

SOURCE: OVERHEATING

When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

===

Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

===

MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

===

Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

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A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

===
Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

Posted on Dec 05, 2009

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If it is a rushing sound like jet plane, it may be the fan clutch on its way out, this is a common problem.

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It sounds like a fan clutch has failed.

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2003 envoy sounds like a jet i just replaced fan clutch and still sounds loud


IT MAY BE THAT THE CLUTCH IS LOCKED UP BY DEFAULT, SO THE ELECTRONICS TO THE FAN CLUTCH ARE MOST LIKELY THE PROBLEM.

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I would guess it is the electronic fan clutch. It will cause the fan to run too fast (very loud) and the light will come on sometimes.

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If the vehicle has a clutch fan, verses an electric fan, sometimes the clutch will spin the fan too fast or at erratic speeds. I'm not saying that's what it is, but just one possible reason. Seeing how you have the warrany, I would take it in and not leave until they have remedied the problem. Let us know how everything turns out and good luck.

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Had the same problem..sounds like a jet plane taking off..I needed a new fan clutch.

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